diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 07b6f7e..74ddb29 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -321,7 +321,7 @@ jobs:
       - name: Install Rust (nightly)
         run: |
           rustup toolchain install nightly --profile minimal --no-self-update
-          rustup +nightly target add x86_64-unknown-linux-gnu
+          rustup +nightly target add x86_64-unknown-linux-gnu i686-unknown-linux-gnu
           rustup +nightly component add miri
 
       - name: Cache cargo registry & target
@@ -335,13 +335,20 @@ jobs:
           restore-keys: |
             sanitizers-${{ runner.os }}-${{ runner.arch }}-
 
-      - name: Miri FFI tests (scalar scanner)
+      - name: Miri FFI tests x86_64 (scalar scanner)
         run: |
           cargo +nightly miri test --target x86_64-unknown-linux-gnu --no-default-features --test ffi_smoke
           cargo +nightly miri test --target x86_64-unknown-linux-gnu --no-default-features --test ffi_cursor
           cargo +nightly miri test --target x86_64-unknown-linux-gnu --no-default-features --test ffi_strings
           cargo +nightly miri test --target x86_64-unknown-linux-gnu --no-default-features --test ffi_ops_interleave
 
+      - name: Miri FFI tests i686 (32-bit validation)
+        run: |
+          cargo +nightly miri test --target i686-unknown-linux-gnu --no-default-features --test ffi_smoke
+          cargo +nightly miri test --target i686-unknown-linux-gnu --no-default-features --test ffi_cursor
+          cargo +nightly miri test --target i686-unknown-linux-gnu --no-default-features --test ffi_strings
+          cargo +nightly miri test --target i686-unknown-linux-gnu --no-default-features --test ffi_ops_interleave
+
       - name: ASan FFI smoke tests
         continue-on-error: true
         env: